Transformer



April 24, 1928. 1,666,889

. J. DESLOGE TRANSFORMER Filed March 30. 1925 INVENTOE fiJe a/J DeJ/ e.

Patented Apr. 24, 1928.

,UNlTED STATES 1,666,889; PATENT OFFICE.

JOSEPH DESLOGE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO KILLARK ELECTRIC MANU- FACTURING COMPANY, OFST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

TRANSFORMER.

Application filed larch 80, 1925. Serial No. 19,478.

This invention relates generally totransformers and, more particularly, to a certain new and useful improvement intransformers of so-called bell-ringing type.

My invention has for its principal object the provision of a transformer especially of the type mentioned in which the housing or shell comprises a plurality of complementary sections adapted'not only to enclose and house the core and windings of the transformer, but also to securely maintain and hold the superposed laminations of the core in compact rigid relation and thereby obviate vibrations in and separation of the laminations that might affect the efficiency of the transformer.

My invention has for a further object the provision ofa transformer especially of the type stated in which the shell is formed of and includes a plurality of complementary sections readil and inefipensivelystamped, pressed, or ot ierwise constructed of sheet metal and adapted for convenient engagement the one with the other in assembled housing formation about the core and wind-- ings of the transformer.

And with the above and other objects in view, my present. invention resides in the novel features of form, construction, ar-

rangement, and combination of parts hereinafter-described and pointed out in the claims.

In the accompanying drawing, Figure 1 illustrates in end elevation a bellringing transformer embodying an enclosin ing-housing or shell of my invention;

Figures 2, 3 and 4 are, respectively, plan, sectional, and inverted plan views of the transformer; and

' Figure 5 is an .end' elevational view of a transformer embodying a slightly modified form of enclosing housing or shell of my invention. Referring now more in detail and by refwhich posed in staggered relation, suitably wound about the center-tongue of which are the windings B, of which G, C, are the primary leads and D, D, the secondary leads or conducting members to the bell or other translating device. Enclosing the core A and windings B is a housing or shell including a main or body section F and a closuresection G.

The shell main-section F is constructed of suitable sheet material stamped and bent or otherwise suitably formed to integrally include a top wall 1 pressed or drawn to bulge outwardly within its'area, as at 2, the marginal portion of wall 1 being approximately. flat and preferably as'shown, rectangular in outline in plan view, opposite so-called side walls 3, 3' projecting downwardly from and atright angles to the marginal portion of wall 1 and bent outwardly at right angles at their free lower ends to provide oppositely disposed securing or supporting feet t, 4, and opposite so-called projecting from and at right angles to the marginal portion of wall 1 intermediate of,

kerfed and thereby split from, the side walls 3, 3, the end walls relatively to the side wa ls 3, to correspond approximately with the depth of core A, as best seen in Figure 3, and each end wall 5 being provided at its free edge with preferably pair of bendable tongues or a marginal extension 6, for purposes shortly appearhell closure-section G is substantially a counter-part of top-wall 1 only of shell main section F and is similarly constructed of suitable sheet material pressed or drawn to likewise bulge outwardly within its area, as at 7.

In use and operation and in assembling the transformer, the core A and its windings Bare suitably disposed within shell main 5 bein of reduced length crence characters to the drawing, I illustrates bothv preferred and modified embodiments of -my invention, A designates the core of the transformer, which may be of any suitable or approved form and con- 5 struction; preferably, however, core A comprises and is built up of a plurality of 11p proximately E-shaped laminations, more fully shown and described in United States Letters Patent/No. 1,513,972, issued to me under date of November 4th, 1924, supersection F, with the upper lamination of the core disposed at its margin flatwise upon the flat marginal'portion of the wall 1, the shell section F. being preferably at opposite faces or cheeks of its dome-shaped portion 2 formed with suitable apertures, as shown, for conveniently accommodating both the primary leads C and the secondary conductors D, and the dome-shaped portions 2 and 7 of the shell-sections also providing, it may be here stated, suitable space or cham- 11 bers within the shell for accommodating the windings B, as best seen in Figure 3. The closure-section G is now disposed intermediate .the side walls 3 with its marginal approximately flat portion 8 upon the under one of the laminations of the core A, as seen in Figure 3. and the core laminations A and the core-section G now tightly compressed or compacted to dispose the closureseetion G at its margin 8 substantially in the plane of the free edges of the end walls 5, when the end-wall integral tongues or marginal extensions 6 are bent over and clinched upon the marginal portion 8 of the section G. The shell-sections F- and G are thereby rigidly joined together in complete housing formation about the core A and its'windings B and, at the same time, the laminations of the core A, articularly at the corners, are securely held bolts or other such fastening means, and V1- brations and other faults which might affect the efliciency of the transformer thereby obviated; It will be noted that, when so assembled and joined or connected together by the end-wall extensions or tongues 6, the closure-section G sets within the extended lengthpf the side walls 3, so that the transformer may be evenly rested or attached at ifts feet 4 upon any suitable supporting surace. 9 v

My new transformer-shell may be readily and inexpensively constructed, its parts, including core, windings, and shell, may be conveniently assembled, the whole when assembled is compact and rigid, fulfills in every respect the subjects stated, and is exceedingly efficient in the performance of its intended functions. I

In the "modified form of my new transformer shell illustratedinFigure 5, the main.

shell-section F includes a top wall 1 having the chamber-providing bulge or dome 2, opposite end walls 5', and a single side wall 3', the top 'wall 1' being extended at one margin, as at 9, and then bent outwardly to provide a supporting-foot 4. Similarly, cooperating'with'and secured by tongues 6 to, the main-section F to enclose the, core and windings, is a closure-section G, in this instance, however, likewise extended at one margin, as at 10, and bent outwardly to provide a second and oppositely disposed supporting foot 4'. Then set in between the cover-section G and the marginal portionv of wall 1 of main section F to complete the shell, is a separate or secondside wall 11,

prongs 12 struck from the main-section F and from the closure-section G engaging the under face of the wall 11 to rigidly secure the same in lace.

While preferab y, as here shown andas I have before stated, each end wall 5 is provided with a pair of the clinching tongues together in superposed compact relation, without the employment of 6, it will be understood that each wall 5 may be provided with a greater number of such stituted for those herein shown and described without departing from the nature and principle of my invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. Ina transformer, a core comprising a plurality of laminations, in combination with an enclosing shell including a main section comprising a top wall, a pair of opposite side walls, and a pair of opposite end walls, a closure section adapted for disposition intermediate. the side walls and to rest at its margin upon an outer end lamination of the core, said end walls being of reduced length relatively to the side-walls, and bend able tongues integral with the end walls adapted for clinching engagement over and upon the margin of the closure-section for securing said sections together in housing formation about the core and said laminations in compact, rigid and compressed relations.

2. In a transformer, a shell including a a stamped sheet metal main section integrally comprising atop wall, a pair of opposite side walls, and a pair of opposite end walls, a stamped sheet metal closure section adapted for disposition intermediate the side walls and to rest at its margin upon anouter end lamination of the core, said end walls being of reduced length relatively to the side-Walls,

and bendable tongues integral with the end walls adapted for clinching engagement over and upon the margin of the closure-section for securing said sections together in hous-, ing formation about the core and the laminations in compact, rigid and compressed relation.

3. In a transformer, in combination with a core comprising a plurality of laminations,

iso

section engaging flatwise at its said marginal I portion upon the outer face of the opposite end lamination .of the core in opposed relation to the fiat marginal portion of the main section, and extensions on said end walls clinchable over and upon the marginal portion of the closure-section for both rigidly securing said sections together'in housing formation about the core and said laminations in compact, rigid, and

lation. I

4. In a transformer, in combination-with a core comprising a plurality of laminations, an enclosing shell comprising a main section including a top wall and pairs of opposite side and end.walls, the to wall having a centrally-disposed outward y-presented dome-sha portion and a flat marginal portion, t e top wall engaging flat 20 wise at its sald marginal portion upon the compressed reouter face of the one end lamination of the core, and a complementary closure-section also including a centrally disposed outwardly presented dome-shaped portion and a flat marginal portion, the closure section being disposed intermediate said side walls and engaging flatw-ise at its said marginal portion upon the outer face of the opposite end lamination of the core in opposed relation to the flat marginal portion of the main section, and extensions on said end walls clinchable over and upon the marginal portion of the closure-section for both rigidly securing said sections together in housing formation about the'core and said laminations in compact, rigid, and compressed relation.

In testimony whereof I hereunto aflix my signature.

JOSEPH DESLOGE. 

